×

Apparatus for estimating road friction coefficient

  • US 6,543,278 B1
  • Filed: 07/28/2000
  • Issued: 04/08/2003
  • Est. Priority Date: 07/30/1999
  • Status: Expired due to Fees
First Claim
Patent Images

1. An apparatus for estimating a friction coefficient on a road for vehicles, the apparatus comprising:

  • a vehicle operating parameter calculator to calculate a vehicle operating parameter based on vehicle operating conditions;

    a basic parameter calculator to calculate a basic parameter by inputting the vehicle operating parameter into a vehicle operating model;

    a first reference value calculator to calculate a first reference value by inputting the vehicle operating parameter into said vehicle operating model for the road with the large friction coefficient;

    a second reference value calculator to calculate a second reference value by inputting the vehicle operating parameter into said vehicle operating model for the road with the small friction coefficient; and

    an estimator to estimate a friction coefficient on road based on the basic parameter, the first reference value and the second reference value.

View all claims
  • 1 Assignment
Timeline View
Assignment View
    ×
    ×